EP 1049344 A1 20001102 - Base station equipment for a mobile telecommunications network
Title (en)
Base station equipment for a mobile telecommunications network
Title (de)
Basisstationsanlage für ein mobiles Vermittlzngsnetz
Title (fr)
Equipement pour station de base d'un réseau de télécommunications mobile
Publication
Application
Priority
EP 99303280 A 19990427
Abstract (en)
Radio units are proposed having an enclosure containing a radio transmitter, a radio receiver and a processor for communicating with mobile terminals via the transmitter and the receiver and with a switching centre via an uplink data port and a transmission line having a nominal impedance. It is further proposed to provide a downlink data port connected directly by at least one pair of conductors to the uplink data port so that two or more radio units can be daisy chained together. A downlink port of a first radio unit would be connected to an uplink port of a second radio unit, so that the second can communicate with the switching centre via the first The invention is based on the recognition that at the end of the daisy chain, the at least one pair of conductors needs to be terminated in the nominal impedance of the transmission line or reflections will occur. It is desired that all radio units should be identical, in the sense that there is no desire to have a special radio unit to terminate a transmission line. The last radio unit in the chain, being most remote in the chain from the switching centre, is disclosed having connected to its downlink port an adapter connecting the conductors in the or each pair with an impedance having the nominal impedance of the transmission line. <IMAGE>
IPC 1-7
IPC 8 full level
H04Q 7/30 (2006.01)
CPC (source: EP)
H04B 3/02 (2013.01)
Citation (search report)
- [X] EP 0830041 A2 19980318 - LUCENT TECH NETWORK SYS GMBH [DE]
- [A] US 4686671 A 19870811 - BURIAN THEODOR [DE], et al
- [A] BURIAN T: "SWTICHING PHILOSOPHY OF THE DIGITAL CELLULAR RADIO TELEPHONE SYSTEMCD900", PROCEEDINGS OF THE NORDIC SEMINAR ON DIGITAL LAND MOBILE RADIOCOMMUNICATION (DMR), ESPOO, FINLAND, FEB. 5 - 7, 1985, 5 February 1985 (1985-02-05), GENERAL DIRECTORATE OF POSTS AND TELECOMMUNICATIONS;FINLAND, pages 271 - 278, XP000405980
Designated contracting state (EPC)
DE FI FR GB SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 99303280 A 19990427